4 guides
Create mail flow rules (transport rules) in Exchange Online: add disclaimers, route mail, block attachments, and warn on external senders, with EAC and PowerShell steps.
Shared mailbox vs user mailbox in Microsoft 365: licensing, sign-in, sending, storage limits, and when to convert one to the other. A practical admin comparison.
Use message trace in the Exchange admin center to find where an email went: read Delivered, Pending, Failed, and Quarantined statuses, and run a detailed trace for older mail.
Create a shared mailbox in Microsoft 365 the right way: admin center and Exchange admin center steps, Full Access vs Send As permissions, and the 50GB license rule.